Panel frame



FIG. 1 is a top front perspective view of a panel frame showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a top front perspective view thereof in an environment in which it may be used; and,

FIG. 9 is a cross-sectional view thereof taken along line 9-9 of FIG. 8.

The broken lines in the Figures show portions of the panel frame and environment that form no part of the claimed design. 

CLAIM The ornamental design for a panel frame, as shown and described. 